The loan amount is 4 million yuan, the term is 20 years, and the interest rate is 5%. There are two repayment methods:

1. Equal principal and interest method: the monthly repayment amount is 26,398.23 yuan (the same every month), and the total principal and interest is 6,335,575.10 yuan, of which the interest is 2,335,575.10 yuan.

2. Average capital method: the monthly repayment amount is different. The repayment amount in the first month is 33,333.33 yuan (it will decrease month by month, with a monthly decrease of 69.44 yuan), and the repayment amount in the last month is 16736. 1 1 yuan, with a total principal and interest of 6,008,333.33 yuan, including interest of 2,008,333.33 yuan.

Compared with the above two methods, the average capital method is 32,7241.76 yuan less than the equal principal and interest method. The specific repayment method can be selected when the bank handles the loan procedures.

The above data are calculated on the assumption that the interest rate will remain unchanged throughout the repayment period.